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- W2912952950 abstract "The modified Chaplygin gas could be considered to abide by the unified dark fluid model because the model might describe the past decelerating matter dominated era and at present time it provides an accelerating expansion of the Universe. In this paper, we have employed the Planck 2015 cosmic microwave background anisotropy, type-Ia supernovae, observed Hubble parameter data sets to measure the full parameter space of the modified Chaplygin gas as a unified dark matter and dark energy model. The model parameters B s , α , and B determine the evolutional history of this unified dark fluid model by influencing the energy density ρ MCG = ρ MCG0 [ B s + (1 − B s ) a −3(1 + B )(1 + α ) ] 1/(1 + α ) . We assumed the pure adiabatic perturbation of unified modified Chaplygin gas in the linear perturbation theory. In the light of Markov chain Monte Carlo method, we find that B s = 0.727 +0.040+0.075 −0.039−0.079 , α = −0.0156 +0.0982+0.2346 −0.1380−0.2180 , B = 0.0009 +0.0018+0.0030 −0.0017−0.0030 at 2 σ level. The model parameters α and B are very close to zero and the nature of unified dark energy and dark matter model is very similar to cosmological standard model ΛCDM." @default.
- W2912952950 created "2019-02-21" @default.
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- W2912952950 date "2019-02-26" @default.
- W2912952950 modified "2023-10-14" @default.
- W2912952950 title "Astronomical bounds on the modified Chaplygin gas as a unified dark fluid model" @default.
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- W2912952950 doi "https://doi.org/10.1051/0004-6361/201833836" @default.
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